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Note 14 - Restructuring Costs - Summary of Restructuring Costs by Segment (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016
Restructuring and related costs, incurred cost |  | $ 697 |  | $ 1,353
Corporate, Non-Segment [Member] |  |  |  |
Restructuring and related costs, incurred cost |  |  |  | 111
Lighting Segment [Member] | Operating Segments [Member] |  |  |  |
Restructuring and related costs, incurred cost |  | 476 |  | 1,021
Graphics Segment [Member] | Operating Segments [Member] |  |  |  |
Restructuring and related costs, incurred cost |  | $ 221 |  | $ 221

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- Definition Discloses the amount charged against the accrued restructuring reserves, or earnings if not previously accrued, during the period for the specified type of restructuring cost. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 + Details
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